Sugar-cane mill.



G. J. HEDEMANN.

SUGAR CANE MILL.

nruouxox rmzn 0011, ms.

Patented Aug. 4, 1914.

THE NORRIS PETERS CO4. PHOTO'LITHO. WASHINGTON. L) C.

n sra'rns PA CHRISTIAN J'. HEDEMANN, OF HONOLULU, TERRITORY OF HAWAII, ASSIGNOR TO HONOLULU IRON WORKS COMPANY, OF HONOLULU, TERRITORY OF HAWAII, A. CORPORATION OF THE TERRITORY OEHAWAII.

SUGAR-CANE MILL.

To all whom it may concern:

Be it known that I, CHRISTIAN J. Henn- MANN, a citizen of the United States, residing at Honolulu, in the county of Honolulu, Territory of Hawaii, have invented certain new and useful Improvements in Sugar-Cane Mills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled inthe art to which it appertains to make and use the same.

This invention relates to sugar-cane mills having three crushing rollers mounted in triangular arrangement, and particularly to the method of applying hydraulic pressure to the top roller of such mills. In mills of the above type, the separating force between the rear or discharge roller and the top roller is always in excess of that between the front or feed roller and the top roller, so that the line representing the resultant of these spreading strains is always inclined to the vertical. F or this reason, mills have been designed having the hydraulic jacks so placed as to operate at a fixed angle to the vertical, which is supposed to correspond to the angle of the resultant line just mentioned, in order that the pressure may be imposed on the brasses of the top roller journals in a line coincident with said resultant line. It has been found, however, that the angle which this resultant line makes with the vertical is not fixed but varies with the different conditions under which the mill operates, such as the setting of the rollers, the percentage of the fiber in the cane, etc. It is, therefore, advantageous to have the mill so arranged that the angle at which the hydraulic pressure is applied to the top roller may be easily altered to suit these conditions, the proper angle being determined experimentally.

The object of the present invention is to provide a mill to accomplish this result in a simple and eflicient manner.

The following is a specific description of one form of the invention, while the appended claims define the actual scope thereof.

This invention contemplates, a bushing or the like adapted to be turned in the housing about the axis of the top roller as a center, said bushing containing the bottom brass and forming guides for the top brass of the journal of the top roller, means for locking Specification of Letters Patent.

Application filed October 7, 1913.

Patented Aug. 4, 1914. Serial No. 793,885.

said bushing or the like in any desired angu lar position, a distance-piece removably securedbetween the upper ends of the jaws of the upper gap of the housing, the bottom of the said distance-piece being curved to the arc of a circle the center of which coincides with the axis of the top roller, and a hydraulic jack adapted to operate between the top brass of the journal of the top roller and the said distance-piece.

The accompanying drawing, forming a part of this specification, illustrates in side elevation the upper portion of a sugar-cane mill embodying a preferred form of my invention.

Referring to the drawing, the aws 1" and 1 of the upper gap in the housing 1 are made longer or higher than is usual, and a distancepiece 2 is removably secured between said jaws by the bolt 3 and the keys 4 as shown. The bottom of this distance-piece 2 is curved to the arc of a circle struck from the axis 5 of the top roller 6 as a center.

The bushing '7 is adapted to be turned in the housing 1 about the axis 5 of the top roller 6 as a center, and may be locked in any desired angular position by the plate 8 secured to the side of the housing 1 by the screws 9 with its teeth S engaging corresponding notches 7 in the periphery of the bushing 7. The bushing 7 is provided with a lower brass 10 for the journal 6 of the top roller 6, and with jaws 7 b for guiding the top brass 11 with the movement of the said roller.

The hydraulic jack 12 with its ram 13 is interposed between the top brass 11 and the distance-piece 2. The hydraulic jack 12 is connected to an accumulator in the usual well known manner; and it may be provided with a recess 12 to fit over a boss or projection 11 on the top brass 11 to center the said jack. The outer end of the ram 13 is made curved to fit the bottom of the distancepiece 2 and abut the same in whatever angular position between the jaws 1 and 1 the hydraulic jack 12 may operate.

It will now be noted that the bushing 7 may be turned about the axis 5 in the housing 1 by removing the plate 8 when the pres sure is oil the jack 12, so that the angle to the vertical at which the jack 12 is to operate may thus be increased or diminished and set as desired, the bushing 7 being again locked in position by the plate 8. The distance piece 2 may be easily removed when it be comes necessary to remove the top roller from the housing. Of course the housing is made of material having sufiicient tensile strength to safely withstand the strains imposed.

I claim:

1. In a sugar-cane mill, three rollers in triangular arrangement, a hydraulic jack for imposing a pressure on the upper of said rollers at an angle to the vertical, and means for altering said angle of applied hydraulic pressure.

2. In a sugar-cane mill, three rollers, a housing, and a distance-piece removably secured between thejaws of the upper gap in saidhousing, the bottom of said distantpiece being curved to the arc of a circle the center of which coincides with the axis of one of said rollers, substantially as and for the purpose described.

3. In a sugar-cane mill, three rollers, a housing a distance-piece secured between the jaws of the upper gap in said housing, the bottom of said distance-piece being curved to the arc of a circle, the center of which coincides with the axis of the top roller, and a hydraulic jack interposed between the top roller and said distance-piece, substantially as and for the purpose described.

4. In a sugar-cane mill, three rollers, a housing, a bushing or the like in the housing, and means for locking the bushing in any desired angular position in saidhousing, said bushing or the like adapted to guide the top brass with the movement of the top roller, substantially as described.

5. In a sugar-cane mill, having three rollers in triangular arrangement, a bushing in the housing adapted to be turned concentrically about the top roller and guide the upper brass of said roller, means for lock-- ing the bushing in any desired position, and a hydraulic jack interposed between said upper brass and a distance-piece secured between the jaws of the upper gap in said housing, substantially as described.

In testimony whereof I affix my signature, in presence of two witnesses.-

CHRISTIAN J. HEDEMANN. Witnesses:

W. J. DYIR, RoBT. J PRATT.

Camera of this patent may' be obtained for five cents each, by addressing the Commissioner of Iatenta, Washington, D. G. 

